powerpc/t1040qds: enable peripheral clock for eSDHC

Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/configs/T1040QDS.h b/include/configs/T1040QDS.h
index a8f0dc2..fc263df 100644
--- a/include/configs/T1040QDS.h
+++ b/include/configs/T1040QDS.h
@@ -592,6 +592,7 @@
 
 #ifdef CONFIG_MMC
 #define CONFIG_FSL_ESDHC
+#define CONFIG_FSL_ESDHC_USE_PERIPHERAL_CLK
 #define CONFIG_SYS_FSL_ESDHC_ADDR       CONFIG_SYS_MPC85xx_ESDHC_ADDR
 #define CONFIG_CMD_MMC
 #define CONFIG_GENERIC_MMC